Oftentimes, especially when playing against other starter decks, you'll find yourself in situations where both players are building their boards but neither are willing to start questing and risk losing their characters
Upgraded List Scions & Spellcraft Scions & Spellcraft is a White / Blue / Black deck that is all about casting noncreature spells for value, and you get bonus value if the spell has a high mana value
Taurean Mauler is one of the best options, as its stats will constantly increase when your opponents cast spells
Tolkiens Lord of the Rings book trilogy (and slightly on The Hobbit and The Silmarillion )
Helm of the Host on Muldrotha is something that is easy in Solitarie, and nearly impossible in a real game with real opponents.
Aside from all this, you've got the likes of Beast Tragic Hero (affectionately referred to as 'Emo Beast'), a one-man